ATE431012T1 - CIRCUIT ARRANGEMENT FOR A CAPACITIVE PROXIMITY SWITCH - Google Patents

CIRCUIT ARRANGEMENT FOR A CAPACITIVE PROXIMITY SWITCH

Info

Publication number
ATE431012T1
ATE431012T1 AT04702297T AT04702297T ATE431012T1 AT E431012 T1 ATE431012 T1 AT E431012T1 AT 04702297 T AT04702297 T AT 04702297T AT 04702297 T AT04702297 T AT 04702297T AT E431012 T1 ATE431012 T1 AT E431012T1
Authority
AT
Austria
Prior art keywords
connecting means
circuit arrangement
sensor element
capacitive sensor
capacitive proximity
Prior art date
Application number
AT04702297T
Other languages
German (de)
Inventor
Randolf Kraus
Original Assignee
Ego Elektro Geraetebau Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ego Elektro Geraetebau Gmbh filed Critical Ego Elektro Geraetebau Gmbh
Application granted granted Critical
Publication of ATE431012T1 publication Critical patent/ATE431012T1/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/96—Touch switches
    • H03K17/962—Capacitive touch switches
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
    • H03K2217/96—Touch switches
    • H03K2217/9607—Capacitive touch switches
    • H03K2217/96071—Capacitive touch switches characterised by the detection principle
    • H03K2217/960725—Charge-transfer

Landscapes

  • Electronic Switches (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)

Abstract

Disclosed is a charge transfer-based circuit arrangement for capacitive proximity switches comprising a capacitive sensor element (C3), the capacity of which changes according to the actuation mode. The circuit arrangement includes a central capacitor (C2), a first controllable connecting means (D2) that impinges the capacitive sensor element with a charging voltage (U3) according to a triggering signal, and a second controllable connecting means (T1) which connects the capacitive sensor element to the central capacitor according to the triggering signal in order to transfer the charge from the capacitive sensor element to the central capacitor. The charging voltage can be an AC voltage while the connecting means can be impinged upon by the AC voltage in such a way that the first connecting means or the second connecting means is alternately conductive.
AT04702297T 2003-01-24 2004-01-15 CIRCUIT ARRANGEMENT FOR A CAPACITIVE PROXIMITY SWITCH ATE431012T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10303480A DE10303480A1 (en) 2003-01-24 2003-01-24 Circuit arrangement for a capacitive proximity switch
PCT/EP2004/000236 WO2004066498A1 (en) 2003-01-24 2004-01-15 Circuit arrangement for a capacitive proximity switch

Publications (1)

Publication Number Publication Date
ATE431012T1 true ATE431012T1 (en) 2009-05-15

Family

ID=32667928

Family Applications (1)

Application Number Title Priority Date Filing Date
AT04702297T ATE431012T1 (en) 2003-01-24 2004-01-15 CIRCUIT ARRANGEMENT FOR A CAPACITIVE PROXIMITY SWITCH

Country Status (11)

Country Link
US (1) US7479791B2 (en)
EP (1) EP1586164B1 (en)
JP (1) JP3990436B2 (en)
CN (1) CN100359806C (en)
AT (1) ATE431012T1 (en)
AU (1) AU2004206613B2 (en)
DE (2) DE10303480A1 (en)
ES (1) ES2325813T3 (en)
PL (1) PL208754B1 (en)
SI (1) SI1586164T1 (en)
WO (1) WO2004066498A1 (en)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005007939B4 (en) * 2004-12-11 2009-01-29 Diehl Ako Stiftung & Co. Kg Circuit arrangement for a capacitive touch sensor
DE102005014933A1 (en) * 2004-12-17 2006-07-06 Diehl Ako Stiftung & Co. Kg Circuit arrangement for a capacitive touch switch
DE102005024772A1 (en) * 2005-05-20 2006-11-23 E.G.O. Elektro-Gerätebau GmbH Circuit arrangement for a capacitive proximity switch
FR2886725B1 (en) * 2005-06-01 2007-08-31 Valeo Securite Habitacle Sas DEVICE FOR DETECTING A CAPACITANCE VARIATION AND CAPACITIVE SENSOR FOR DETECTING THE PRESENCE OF A USER, IMPLEMENTING SUCH A DEVICE
US7288946B2 (en) 2005-06-03 2007-10-30 Synaptics Incorporated Methods and systems for detecting a capacitance using sigma-delta measurement techniques
US7449895B2 (en) 2005-06-03 2008-11-11 Synaptics Incorporated Methods and systems for detecting a capacitance using switched charge transfer techniques
US7301350B2 (en) 2005-06-03 2007-11-27 Synaptics Incorporated Methods and systems for detecting a capacitance using sigma-delta measurement techniques
US7777501B2 (en) 2005-06-03 2010-08-17 Synaptics Incorporated Methods and systems for sigma delta capacitance measuring using shared component
JP5395429B2 (en) 2005-06-03 2014-01-22 シナプティクス インコーポレイテッド Method and system for detecting capacitance using sigma delta measurement
US7902842B2 (en) 2005-06-03 2011-03-08 Synaptics Incorporated Methods and systems for switched charge transfer capacitance measuring using shared components
DE102005041113A1 (en) 2005-08-30 2007-03-01 BSH Bosch und Siemens Hausgeräte GmbH Capacitive proximity switch for e.g. washing machine, has semiconductor switch comprising signal input with clock signal and signal output, where output has output signal, which has signals portions that are proportional to capacitance
DE102006025069B4 (en) * 2006-05-23 2016-09-22 E.G.O. Elektro-Gerätebau GmbH Sensor element arrangement for an operating device and method for operating such a sensor element arrangement
DE102006045737A1 (en) * 2006-09-18 2008-03-27 E.G.O. Elektro-Gerätebau GmbH Circuit arrangement for determining a capacitance of a capacitive sensor element
CN101436853B (en) * 2007-11-15 2010-07-07 盛群半导体股份有限公司 Device and method for reducing input noise
DE102008057433A1 (en) * 2008-11-07 2010-05-12 E.G.O. Elektro-Gerätebau GmbH Circuit arrangement for determining the capacitance of at least two capacitive sensor elements
US8237456B2 (en) 2009-03-02 2012-08-07 Atmel Corporation Capacitive sensing
DE102009013532A1 (en) * 2009-03-19 2010-09-30 E.G.O. Control Systems Gmbh Circuit arrangement for determining a capacitance of a capacitive sensor element
US8362784B2 (en) * 2009-06-22 2013-01-29 Mitsubishi Electric Corporation Capacitor capacitance diagnosis device and electric power apparatus equipped with capacitor capacitance diagnosis device
US9274643B2 (en) 2012-03-30 2016-03-01 Synaptics Incorporated Capacitive charge measurement
LU92627B1 (en) * 2014-12-31 2016-07-01 Iee Sarl
US10365749B2 (en) 2016-03-30 2019-07-30 Synaptics Incorporated Capacitive sensing device with single reference channel
IT201600103234A1 (en) 2016-10-14 2018-04-14 Green Seas Ventures Ldt Constructive system relating to a capacitive voltage sensor
IT201800004114A1 (en) 2018-03-30 2019-09-30 Green Seas Ventures Ltd C/O Citco B V I Ltd CONSTRUCTION SYSTEM WITH A CAPACITIVE VOLTAGE SENSOR
CN119986166A (en) 2018-12-17 2025-05-13 G&W电气公司 Electrical sensor assembly
WO2020131903A1 (en) 2018-12-17 2020-06-25 G & W Electric Company Electrical sensor assembly
FR3107129B1 (en) * 2020-02-10 2022-02-18 St Microelectronics Sa Device and method for detecting tactile contact

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US4345167A (en) * 1978-07-14 1982-08-17 Calvin Noel M Capacitance proximity sensor
DE3544187A1 (en) * 1985-12-13 1987-06-19 Flowtec Ag CAPACITY MEASURING
DE19528454C1 (en) * 1995-08-03 1996-08-08 Grieshaber Vega Kg Capacitance measurement via discharge current arithmetic mean determn., esp. for level sensing capacitive transducer
DE19701899C2 (en) * 1996-01-21 2001-01-25 Ifm Electronic Gmbh Circuit arrangement and method for detecting the capacitance or a change in capacitance of a capacitive circuit or component
US6194903B1 (en) * 1996-01-21 2001-02-27 I F M Electronic Gmbh Circuit for acquisition of the capacitance or capacitance change of a capacitive circuit element or component
DE19744152A1 (en) * 1997-10-07 1999-04-29 Ifm Electronic Gmbh Circuit arrangement for detecting the capacitance or a change in capacitance of a capacitive circuit or component
EP0859467B1 (en) 1997-02-17 2002-04-17 E.G.O. ELEKTRO-GERÄTEBAU GmbH Touch switch with sensor key
EP0859468B1 (en) * 1997-02-17 2004-11-17 E.G.O. ELEKTRO-GERÄTEBAU GmbH Circuitry for a sensor element
US6466036B1 (en) * 1998-11-25 2002-10-15 Harald Philipp Charge transfer capacitance measurement circuit
DE19907214A1 (en) * 1999-02-19 2000-08-24 Ego Elektro Geraetebau Gmbh Circuit for sensor element, particularly for touch operated switch, has AC voltage energizing signal
DE10005173A1 (en) * 2000-02-05 2001-08-09 Ego Elektro Geraetebau Gmbh Circuit for capacitive sensor element of contact switch has signal source supplying transistor via filter and potential divider; sensor element connected between transistor base and earth
US6362632B1 (en) * 2000-05-24 2002-03-26 Becs Technology, Inc. Balanced charge pump capacitive material sensor
DE10336335B4 (en) * 2003-08-08 2015-03-12 Huf Hülsbeck & Fürst Gmbh & Co. Kg Locking device for vehicles

Also Published As

Publication number Publication date
JP2006516850A (en) 2006-07-06
ES2325813T3 (en) 2009-09-18
PL376484A1 (en) 2005-12-27
EP1586164A1 (en) 2005-10-19
WO2004066498A1 (en) 2004-08-05
US7479791B2 (en) 2009-01-20
PL208754B1 (en) 2011-06-30
JP3990436B2 (en) 2007-10-10
AU2004206613A1 (en) 2004-08-05
CN1742433A (en) 2006-03-01
DE502004009450D1 (en) 2009-06-18
US20060238233A1 (en) 2006-10-26
EP1586164B1 (en) 2009-05-06
SI1586164T1 (en) 2009-10-31
AU2004206613B2 (en) 2009-01-08
DE10303480A1 (en) 2004-08-05
CN100359806C (en) 2008-01-02

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Legal Events

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REN Ceased due to non-payment of the annual fee